Oscillators – Automatic frequency stabilization using a phase or frequency... – Particular error voltage control
Reexamination Certificate
2005-12-27
2005-12-27
Mis, David (Department: 2817)
Oscillators
Automatic frequency stabilization using a phase or frequency...
Particular error voltage control
C331S025000
Reexamination Certificate
active
06980060
ABSTRACT:
Disclosed is a PLL (Phase Lock Loop) reducing the lock-in-time of the phase lock loop by altering the impedance of the damping resistor portion of the included LPF (Low Pass Filter) as a function of the difference in frequency or phase between a PLL applied reference frequency and the output frequency provided by the VCO (Voltage Controlled Oscillator) portion of the PLL. This variable impedance is accomplished by introducing a feed forward path that switches a capacitor in and out of the circuit in accordance with the difference frequency. One embodiment uses a mixer to provide the difference frequency signal.
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Boerstler David William
Hailu Eskinder
Carr LLP
Gerhardt Diana R.
Mis David
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